Computer Memory Explained | Registers, Cache, RAM & Storage | CS Fundamentals in Hindi #13

A CPU can execute instructions extremely fast, but it constantly needs access to data and instructions. So why don't computers just use one type of memory? The answer is the Memory Hierarchy. In this video, we'll understand why computers use multiple levels of memory and how registers, cache, RAM and storage work together. We will cover: Why computers need memory Why we can't have one type of memory that's fast, large and cheap Memory hierarchy CPU Registers Cache memory L1, L2 and L3 cache RAM SSD and HDD Speed vs capacity vs cost Why CPU needs cache Cache hit and cache miss Temporal locality Spatial locality How data moves through the memory hierarchy Why memory performance matters for overall computer performance The big picture: Registers → Cache → RAM → Storage And ultimately: Storage → RAM → Cache → Registers → CPU This is Video #13 of the Computer Science Fundamentals course in Hindi, part of Part 2 — Computer Architecture. The course is completely language-agnostic. The goal is to understand the fundamental concepts behind Computer Science and how computers actually work.